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Structure of the Cu(II) chloride complex with 4-amino-l,2,4-triazole Cu(C2H4N4)Cl2
Authors:G. V. Romanenko  Z. A. Savelieva  N. V. Podberezskaya  S. V. Larionov
Affiliation:(1) Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Russia
Abstract:The coordination compounds of copper(II) chloride and bromide with 1,2,4-triazole (L1) and 4-amino1,2,4-triazole (L2), CuL1Hal2 and CuL2Hal2, possess interesting magnetic properties [1, 2]. For example, at very low temperatures CuL1Cl2 and CuL1Br2 are ferromagnets [2](T c ≈ 3.3 and 6.5 K, respectively). To explain the magnetic behavior of copper(II) halide complexes with the above nitrogen heterocycles it is generally assumed that the complexes are polynuclear chain compounds in which the copper atoms are bridged by two halogen ions and bridging bidentate heterocycle molecules (coordination of N1 and N2 atoms). This hypothesis is made on the basis of the X-ray diffraction analysis of CuL1Cl2 [3]. It is interesting to perform an X-ray diffraction study of CuL2Cl2 and CuL2Br2; this is important for obtaining reliable magnetostructural correlations for this group of compounds. In this study, we investigated single crystals of the complexes; this demanded choosing special conditions of synthesis, which differ from the conditions suggested for the synthesis of polycrystals in [1]. In this communication we report on the results of synthesis and X-ray diffraction analysis of the single crystals of the coordination compound CuL2Cl2. Translated fromZhurnal Strukturnoi Khimii, Vol. 38, No. 1, pp. 207–212, January–February, 1997.
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